Battery question about BS02 8Ffun 750/1000w

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Uilleam Gilvoni   10 mW

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Battery question about BS02 8Ffun 750/1000w

Post by Uilleam Gilvoni » Feb 24 2016 6:09pm

Hello

Does anyone know how can I use a battery with higher volts than 48v? I mean, I heard some people using 52v or 57v + on their 8fun bafang 750/1000w. How is it possible? Can anyone explain me please?

Thanks!!
Learning everything about E-bikes!

Raged   1 kW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by Raged » Feb 24 2016 8:03pm

The capacitors are rated at about 63v and they have a high voltage cut off (safety) at 60v.

This means the max you can run

14S lipo - also known as 52V - hot off the charger voltage is 58.8v ( 14 x 4.2v )
13S lipo - Also known as 48v - hot off the charger voltage is 54.6v ( 13 x 4.2v )

Battery voltage drops as it is being used. Fully charged (hot off the charger) may be 58.8v, but after you use 50%-60% of the battery, the voltage may drop down to 50.4v ( 14 x 3.6v ). This is why controllers have a working voltage range to cater for the battery voltage differences between fully charged and near dead.
Focus Black Forest 29er - MAC10T 14S Lipo - 50km/h, 50km range. (dead)http://endless-sphere.com/forums/viewto ... 91&start=0
Cube Reaction 29er Cyclocross BBS02 http://endless-sphere.com/forums/viewto ... =6&t=70549

2old   100 kW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by 2old » Feb 24 2016 8:39pm

Just to augment Raged's comment, I've been using a 52V battery (Luna 52V, 10 ah, 26f cells) with my BBS02, and they seem matched perfectly.

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tomjasz   10 GW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by tomjasz » Feb 24 2016 11:56pm

2old wrote:Just to augment Raged's comment, I've been using a 52V battery (Luna 52V, 10 ah, 26f cells) with my BBS02, and they seem matched perfectly.
Great with a BBSHD too.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Ykick   100 GW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by Ykick » Feb 25 2016 7:10am

Know that if you order 52V BBS02 the LVC (low voltage cutoff) will likely be programmed too high to use 48V battery pack at a later time.

Of course, you may reprogram if you have proper hardware/software but as 52V version ships, it’s only meant for 14S (52-58V operating range) Lipoly, Li-ion and not much else.
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Uilleam Gilvoni   10 mW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by Uilleam Gilvoni » Feb 25 2016 9:31am

Ykick wrote:Know that if you order 52V BBS02 the LVC (low voltage cutoff) will likely be programmed too high to use 48V battery pack at a later time.

Of course, you may reprogram if you have proper hardware/software but as 52V version ships, it’s only meant for 14S (52-58V operating range) Lipoly, Li-ion and not much else.
Hello, so I would need to reprogram the 52v battery to make it work right?
Learning everything about E-bikes!

Uilleam Gilvoni   10 mW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by Uilleam Gilvoni » Feb 25 2016 9:35am

Raged wrote:The capacitors are rated at about 63v and they have a high voltage cut off (safety) at 60v.

This means the max you can run

14S lipo - also known as 52V - hot off the charger voltage is 58.8v ( 14 x 4.2v )
13S lipo - Also known as 48v - hot off the charger voltage is 54.6v ( 13 x 4.2v ).
Hi
So.. can I use 52v battery without need of using any additional thing? Just plug and ride?

Thanks
Learning everything about E-bikes!

Uilleam Gilvoni   10 mW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by Uilleam Gilvoni » Feb 25 2016 9:37am

2old wrote:Just to augment Raged's comment, I've been using a 52V battery (Luna 52V, 10 ah, 26f cells) with my BBS02, and they seem matched perfectly.
So no need to configure or anything eh? Great!

Thanks!
Learning everything about E-bikes!

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tomjasz   10 GW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by tomjasz » Feb 25 2016 1:08pm

It's not the optimum solution but it's fine. I run both. 48 and 52V. I don't get all the excitement with 52V. Eventually Bafang will have a 52V version.
Now that the largest supplier of Bafang mid drives is a USA vendor, expect more changes, perhaps even a bit faster. And the support gets better and better.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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tomjasz   10 GW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by tomjasz » Feb 25 2016 1:11pm

Check this out!

http://lunacycle.com/bbs02-parts/

Bearings, pinions, pawls, gears, and more!
I wrote Eric last November and posted here that he promised to bring in parts...well....
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Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

Raged   1 kW

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Re: Battery question about BS02 8Ffun 750/1000w

Post by Raged » Feb 25 2016 10:58pm

Uilleam Gilvoni wrote:

Hi
So.. can I use 52v battery without need of using any additional thing? Just plug and ride?

Thanks
Yes. I run 52v (14S lipo) on a 48v BBS02 750.
Focus Black Forest 29er - MAC10T 14S Lipo - 50km/h, 50km range. (dead)http://endless-sphere.com/forums/viewto ... 91&start=0
Cube Reaction 29er Cyclocross BBS02 http://endless-sphere.com/forums/viewto ... =6&t=70549

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